Seems to me that you live on the north coast. If so just go over to the Sacramento river below Redding. I’ve seen rivercane in many places along the river. Ditto with the Yuba and Feather. Don’t know what the species is but it is most likely different from the type in the S.E. states. I have made arrows from it, but they were very light weight and difficult to straighten. I much prefer bamboo, either Japonica or Tonkin.